[Dnsmasq-discuss] Detecting DHCP Requests from bridged interfaces

Freddie Witherden freddie at witherden.org
Wed Aug 24 11:58:57 BST 2011


I have a bridged network interface, br0, which is made up of eth0 (my
internal LAN) and tap[0,1] (my bridged VPN adapters).  dnsmasq listens
on br0 and handles DHCP for my network.

What I am wondering is if there is any means for dnsmasq to detect DHCP
requests from tap1 and handle them differently -- namely by not
supplying a default gateway.

It is my -- possibly limited -- understanding that ebtables can be used
to mark packets from one side of a bridge.  If this is the case can
dnsmasq pick up on these marks and use them to affect behaviour?

Regards, Freddie.

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